Changing kernel parameters

As has been reported before, Debian on an NSLU2 using raid might not
boot without adding a rootdelay (or was it delayroot) parameter to
the kernel.
That has solved the problem for me previously. But that was on a
NSLU2 with a serial cable. How can I add the parameter on an NSLU2
without serial access?
I can get into RedBoot and hit break by telnetting to 192.168.0.1 port
9000, but what can I do from there?
--
Steinar ; NIL DIFFICILE VOLENTI ; http://latinitas.org ; http://voksenlia.net